Local stratopause temperature variabilities and their embedding in the global context
The stratopause is by definition the transition between the stratosphere and mesosphere. During winter the circulation at mid-latitudes and high latitudes in the stratosphere is mainly driven by quasi-stationary planetary waves (PWs), while the circulation in the mesosphere is mainly driven by gravi...
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ftdoajarticles:oai:doaj.org/article:fda95a39e4bf44ef81c425e6efeb2e14 2023-05-15T13:25:07+02:00 Local stratopause temperature variabilities and their embedding in the global context R. Eixmann V. Matthias J. Höffner G. Baumgarten M. Gerding 2020-03-01T00:00:00Z https://doi.org/10.5194/angeo-38-373-2020 https://doaj.org/article/fda95a39e4bf44ef81c425e6efeb2e14 EN eng Copernicus Publications https://www.ann-geophys.net/38/373/2020/angeo-38-373-2020.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-38-373-2020 0992-7689 1432-0576 https://doaj.org/article/fda95a39e4bf44ef81c425e6efeb2e14 Annales Geophysicae, Vol 38, Pp 373-383 (2020) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2020 ftdoajarticles https://doi.org/10.5194/angeo-38-373-2020 2022-12-31T01:56:23Z The stratopause is by definition the transition between the stratosphere and mesosphere. During winter the circulation at mid-latitudes and high latitudes in the stratosphere is mainly driven by quasi-stationary planetary waves (PWs), while the circulation in the mesosphere is mainly driven by gravity waves (GWs). The question arises of whether PWs or GWs dominate the variability of the stratopause. The most famous and dramatic variability of the middle atmosphere is a sudden stratospheric warming (SSW) generated by PWs interacting with the polar vortex. A similar phenomenon but smaller in magnitude and more regional is stratopause temperature enhancements (STEs) initially observed by local measurements and generated by breaking PWs. Thus it seems that PWs dominate the variability of the stratopause. In this study we want to quantify to which extent quasi-stationary PWs contribute to the stratopause variability. To do that we combine local lidar observations at Kühlungsborn (54 ∘ N, 11 ∘ E) and Andenes (69 ∘ N, 16 ∘ E) with global MERRA-2 reanalysis data bringing the local variability of the stratopause into the global context. Therefore we compare the temperature time series at Kühlungsborn and Andenes at 2 hPa , the altitude where STEs maximize, with characteristics (amplitude and phase) of PWs with wave numbers 1, 2 and 3. We found that for Kühlungsborn and Andenes 98 % of the local day-to-day variability of the stratopause can be explained by the variability of PWs with wave number 1, 2 and 3. Thus, the winter stratopause day-to-day variability is highly dominated by the variability of PWs. Article in Journal/Newspaper Andenes Directory of Open Access Journals: DOAJ Articles Merra ENVELOPE(12.615,12.615,65.816,65.816) Annales Geophysicae 38 2 373 383 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 R. Eixmann V. Matthias J. Höffner G. Baumgarten M. Gerding Local stratopause temperature variabilities and their embedding in the global context |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
The stratopause is by definition the transition between the stratosphere and mesosphere. During winter the circulation at mid-latitudes and high latitudes in the stratosphere is mainly driven by quasi-stationary planetary waves (PWs), while the circulation in the mesosphere is mainly driven by gravity waves (GWs). The question arises of whether PWs or GWs dominate the variability of the stratopause. The most famous and dramatic variability of the middle atmosphere is a sudden stratospheric warming (SSW) generated by PWs interacting with the polar vortex. A similar phenomenon but smaller in magnitude and more regional is stratopause temperature enhancements (STEs) initially observed by local measurements and generated by breaking PWs. Thus it seems that PWs dominate the variability of the stratopause. In this study we want to quantify to which extent quasi-stationary PWs contribute to the stratopause variability. To do that we combine local lidar observations at Kühlungsborn (54 ∘ N, 11 ∘ E) and Andenes (69 ∘ N, 16 ∘ E) with global MERRA-2 reanalysis data bringing the local variability of the stratopause into the global context. Therefore we compare the temperature time series at Kühlungsborn and Andenes at 2 hPa , the altitude where STEs maximize, with characteristics (amplitude and phase) of PWs with wave numbers 1, 2 and 3. We found that for Kühlungsborn and Andenes 98 % of the local day-to-day variability of the stratopause can be explained by the variability of PWs with wave number 1, 2 and 3. Thus, the winter stratopause day-to-day variability is highly dominated by the variability of PWs. |
format |
Article in Journal/Newspaper |
author |
R. Eixmann V. Matthias J. Höffner G. Baumgarten M. Gerding |
author_facet |
R. Eixmann V. Matthias J. Höffner G. Baumgarten M. Gerding |
author_sort |
R. Eixmann |
title |
Local stratopause temperature variabilities and their embedding in the global context |
title_short |
Local stratopause temperature variabilities and their embedding in the global context |
title_full |
Local stratopause temperature variabilities and their embedding in the global context |
title_fullStr |
Local stratopause temperature variabilities and their embedding in the global context |
title_full_unstemmed |
Local stratopause temperature variabilities and their embedding in the global context |
title_sort |
local stratopause temperature variabilities and their embedding in the global context |
publisher |
Copernicus Publications |
publishDate |
2020 |
url |
https://doi.org/10.5194/angeo-38-373-2020 https://doaj.org/article/fda95a39e4bf44ef81c425e6efeb2e14 |
long_lat |
ENVELOPE(12.615,12.615,65.816,65.816) |
geographic |
Merra |
geographic_facet |
Merra |
genre |
Andenes |
genre_facet |
Andenes |
op_source |
Annales Geophysicae, Vol 38, Pp 373-383 (2020) |
op_relation |
https://www.ann-geophys.net/38/373/2020/angeo-38-373-2020.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-38-373-2020 0992-7689 1432-0576 https://doaj.org/article/fda95a39e4bf44ef81c425e6efeb2e14 |
op_doi |
https://doi.org/10.5194/angeo-38-373-2020 |
container_title |
Annales Geophysicae |
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38 |
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2 |
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373 |
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383 |
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